No Switch Without Default

Switch statement may have several cases and one default statement, which will act as a catch-all for all unspecified cases. It is considered good practice to always include a default statement, so as to catch any unusual or exceptional behavior.

It may happens that default case is empty : in that situation, the default is meant to show that doing nothing is an intended behavior.

Rule Details

This rule require that every switch statement has at least a default case.

<?php
switch (foo) {
    case 'a':
        doSomething();
        break 1;

    case 'b':
        doSomething();
        break 1;

    default:
        // do nothing
}
?>

The following patterns are considered warnings:

<?php
switch (foo) {
    case 'a':
        doSomething();
        break 1;

    case 'b':
        doSomething();
        break 1;
}
?>

When Not To Use It

If default is not always necessary, you may disable this rule.